/Engine/Source/Runtime/AIModule/Classes/BehaviorTree/BTNode.h
Get "body" of task's owner / default, having location in world (e.g. Owner = AIController, Avatar = Pawn)
virtual [AActor](API\Runtime\Engine\GameFramework\AActor) * GetGameplayTaskAvatar ( const [UGameplayTask](API\Runtime\GameplayTasks\UGameplayTask) * Task ) const